
At F5, we strive to bring a better digital world to life. Our teams empower organizations across the globe to create, secure, and run applications that enhance how we experience our evolving digital world. We are passionate about cybersecurity, from protecting consumers from fraud to enabling companies to focus on innovation.
Everything we do centers around people. That means we obsess over how to make the lives of our customers, and their customers, better. And it means we prioritize a diverse F5 community where each individual can thrive.
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Design, coding, enhancements, and bug fixing in DNS and related areas.
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Bring up new ideas to improve the day-to-day challenges in the design/functionality.
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Should be able to provide technical direction to the ongoing and future projects in the team.
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Keep the product vulnerability free by uplifting/fixing the open issues.
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Build tools and infrastructure to improve these F5’s components and features.
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Set an example of software design and development innovation and excellence.
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Research, investigate and define new areas of technology to enhance existing or new products directions
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Evaluate performance of products to fine-tune, and refactor the design as per the requirements to scale up.
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Must have worked in security and related areas.
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Document software designs via functional specifications and other design documents
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Conduct presentations internal and external, mentoring the team members
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May participate in the hiring and onboarding process
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Collaborate with team members and technical leads
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Responsible for upholding F5’s Business Code of Ethics and for promptly reporting violations of the Code or other company policies.
Knowledge, Skills and Abilities:
Essential
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Deep understanding of data structures & algorithm.
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Expert in C, C++ with hands-on experience
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Fair understanding of scripting languages Python and JavaScript
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Expertise in Linux user-level programming and exposure to Linux networking stack.
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Good understanding on TCP/IP concepts.
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Proven experience with security standards.
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Excellent analytical and problem-solving skills.
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Good understanding of Network security and DNS modules
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Excellent Understanding of networking technologies and OS internals.
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Prior experience in leading and delivering project/programs involving multiple teams.
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Prior experience of leading and mentoring senior engineers to deliver critical projects.
Nice-to-have
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Prior experience developing DNS and related modules is a Plus.
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Good understanding of network protocols like TCP, UDP, HTTP, SSL, DNS, FTP etc.
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Experience with CI/CD (git, pipeline etc.).
Qualifications
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Requires a minimum of 15+ years of related experience with a Bachelor of Engineering in ECE/Computers or similar years’ experience with ME/MTech in ECE/Computers.
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Excellent organizational agility and interpersonal skills throughout the organization.
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Ability to work flexible hours for better collaboration with international teams.
F5 Inc. is an equal opportunity employer and strongly supports diversity in the workplace. The Job Description is intended to be a general representation of the responsibilities and requirements of the job. However, the description may not be all-inclusive, and responsibilities and requirements are subject to change.

About F5 Networks
About
F5 is an industry leader in Application Delivery Networking and Security, has over 8,000 employees worldwide At F5, we make apps faster, smarter, and safer…from anywhere. Come work within the F5 BIGIP Next Base Operating System team in an exciting, fast past environment charting the course for F5’s future. As a contributing member of the team, you will be integrated into cross functional working project teams in our Product Development organization. Build services that are performant, reliable, secure, and scalable within a company known for our excellent culture. If you enjoy providing quality solutions while keeping a focus on high availability, scalability, maintainability, and security then you are the Software Engineer that we would like to have join our team.
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Job Title : Senior Python Backend Developer
Experience Required : 5+ Years
Location : Gurgaon
Joining : Immediate Joiner Preferred
Employment Type : Full-Time
Job Summary :
We are looking for a highly skilled Senior Python Backend Developer with a minimum of 5 years of experience in Python and its modern web frameworks.
The ideal candidate will be responsible for developing scalable backend services, designing robust APIs, and ensuring optimal performance and security of backend systems.
Mandatory Skills : Python, Django, Flask, Streamlit, Starlette, REST API development, scalable backend services.
Key Responsibilities :
- Design, build, and maintain RESTful APIs and backend systems using Python.
- Work with frameworks such as Django, Flask, Streamlit, Starlette.
- Develop scalable and high-performance backend services.
- Collaborate with frontend developers and product teams to deliver seamless integrations.
- Write clean, maintainable, and testable code.
- Troubleshoot and resolve performance and scalability issues.
- Ensure code quality through automated testing and code reviews.
Required Skills :
- Minimum 5 years of backend development experience in Python.
- Strong expertise in Django, Flask, Streamlit, and/or Starlette.
- Proven experience with API design and development.
- Strong understanding of system architecture, data modeling, and scalability best practices.
- Familiarity with CI/CD pipelines, Docker, and cloud environments is a plus.
Nice to Have :
- Experience with async programming (e.g., using FastAPI, Starlette).
- Familiarity with PostgreSQL, MongoDB, or other relational/noSQL databases.
- Exposure to microservices architecture.
About the Role
We are looking for a passionate AI Engineer Intern (B.Tech, M.Tech / M.S. or equivalent) with strong foundations in Artificial Intelligence, Computer Vision, and Deep Learning to join our R&D team.
You will help us build and train realistic face-swap and deepfake video models, powering the next generation of AI-driven video synthesis technology.
This is a remote, individual-contributor role offering exposure to cutting-edge AI model development in a startup-like environment.
Key Responsibilities
- Research, implement, and fine-tune face-swap / deepfake architectures (e.g., FaceSwap, SimSwap, DeepFaceLab, LatentSync, Wav2Lip).
- Train and optimize models for realistic facial reenactment and temporal consistency.
- Work with GANs, VAEs, and diffusion models for video synthesis.
- Handle dataset creation, cleaning, and augmentation for face-video tasks.
- Collaborate with the AI core team to deploy trained models in production environments.
- Maintain clean, modular, and reproducible pipelines using Git and experiment-tracking tools.
Required Qualifications
- B.Tech, M.Tech / M.S. (or equivalent) in AI / ML / Computer Vision / Deep Learning.
- Certifications in AI or Deep Learning (DeepLearning.AI, NVIDIA DLI, Coursera, etc.).
- Proficiency in PyTorch or TensorFlow, OpenCV, FFmpeg.
- Understanding of CNNs, Autoencoders, GANs, Diffusion Models.
- Familiarity with datasets like CelebA, VoxCeleb, FFHQ, DFDC, etc.
- Good grasp of data preprocessing, model evaluation, and performance tuning.
Preferred Skills
- Prior hands-on experience with face-swap or lip-sync frameworks.
- Exposure to 3D morphable models, NeRF, motion transfer, or facial landmark tracking.
- Knowledge of multi-GPU training and model optimization.
- Familiarity with Rust / Python backend integration for inference pipelines.
What We Offer
- Work directly on production-grade AI video synthesis systems.
- Remote-first, flexible working hours.
- Mentorship from senior AI researchers and engineers.
- Opportunity to transition into a full-time role upon outstanding performance.
Location: Remote | Stipend: ₹10,000/month | Duration: 3–6 months
What you will be Doing
- You will abstract away complex data interactions with easy-to-use APIs that will power several mobile and web applications.
- You will also own, scale, and maintain the computational and storage infrastructure for the various micro-services and long-running jobs, designed and implemented by you and the team.
- We will look to you to make key decisions on the technology stack, architecture, networking, and security. We love working with bleeding-edge technology, especially if it improves the malleability, and simplicity of our deliverables.
What you need
- The ideal Backend Engineers are polyglots who are fluent in HTTP and core CS concepts such as algorithms, data structures, and programming paradigms, and always pick the right tools for the right job.
- They have a keen eye for common security vulnerabilities and how to act on them (example: DDOS attacks, SQL Injection etc.).
- They understand what it takes to work in a startup environment and know when to trade performance for simplicity.
- They fail fast, learn faster, and execute in time.
- Strong communication skills, get-things-done attitude, and empathy
- Strong sense of ownership, drive and obsessive attention to detail.
- Comfortable with iterative development practices and code reviews
- Previous experience as part of a product-oriented team is a plus
Technical Skillsets:
NodeJS + Javascript, GoLang, Typescript + Nodejs, Clojure/Haskell/F#/Scala (languages/environments)
Koa, Express, Play (frameworks)
Asynchronous Programming Frameworks (Akka, Nodejs, Tornado)
MongoDB, postgres, Bigtable, Dynamo (databases)
Apache Kafka, NATS, RabbitMQ, ZeroMQ (queues)
FunctionalProgramming, FRP (functional reactive)
microservices, multi-tenant, distributed-systems, distributed-computing, event-sourcing
Good to have Skillsets:
Clojure/Haskell/F#/Scala
Apache Kafka, NATS
FunctionalProgramming, FRP (functional reactive)
event-sourcing
Koa
Why you should consider this role seriously?
- We have an audacious vision of helping companies fight counterfeiting and managing their supply chain more efficiently
- We have built a product and solved problems for some of the largest brands in the country and tested platform at scale (With our tags present in over 50 Million products already). We have plans to grow 10x in the next 1 year
- Ownership of key problems. Fast-paced environment
- We are a well-balanced team of experienced entrepreneurs and are backed by top investors across India and the Silicon Valley (Venture Highway, Startup Buddy etc.)
- Competitive market salary
- Opportunity to work directly with the CEO, COO, CTO of the company
- A chance to interact with top-notch executives from multiple industries
- Open vacation policy (and we really mean it!)
- Open Pantry
- As a team, we love to travel :). An off-site every quarter
Planning to Apply? Consider this:
Make sure you go through this section very carefully before applying. Here are the most crucial aspects on which we evaluate on:
1: FIT: “We’re on a crusade for something greater than any one of us”!
We are a tight-knit team that works and plays together where ‘fit’ is the most important point that you need to keep in mind while evaluating us- we will be spending a majority of our time together, in office, on calls, even weekends (sometimes) so you’ll really need to assess whether this is the right place for YOU to be in. Are you able to relate to or feel passionate about the problems we’re solving?
2: INTENT: “You won’t just be working with us, you would be investing in us!”
‘Why’ do you want to work with us? Why an early stage startup? Why Original4Sure? We are an industrious team, working tirelessly to achieve our goals so the work hours will be long and with it will come with a steep learning curve. Joining an early stage startup also means you’ll be asked to take on new things with little guidance and you’ll have to figure stuff out on your own, and in doing so, help shape the future of the company. Does that sound scary, exciting, both?
3: CAPABILITY: “Get work done!”
As long as you are working as hard as you can and giving it your best all day, every day, we will get along just fine. No one ever built one of the most valuable businesses in the World without the core team having to make a few sacrifices along the journey. It could be lesser time spent with your family or loved ones or finding lesser time to do to watch TV shows! But that's a call you need to make.
Job Description
- Managing the interchange of data between the server and the users.
- Development of all server-side logic, ensuring high performance and responsiveness to requests from the front-end Integrating the front-end elements built by your co-workers into the application; therefore, a basic understanding of front-end technologies is necessary as well.
- Writing reusable, testable, and efficient code.
- Design and implementation of low-latency, high-availability, and performant applications.
- Integration of user-facing elements developed by front-end developers with server-side logic
- Implementation of security and data protection.
Expected experience with
- Should have worked on the Django REST framework.
- Familiarity with some Pandas, Numpy, text parsing/mining and ORM (Object Relational Mapper) libraries
- Able to integrate multiple data sources and databases into one system
- Understanding of the threading limitations of Python, and multi-process architecture
- Good understanding of server-side templating languages
- Worked on Amazon cloud solutions
- Understanding of accessibility and security compliance
- Knowledge of user authentication and authorization between multiple systems, servers, and environments
- Understanding of fundamental design principles behind a scalable application
- Familiarity with event-driven programming in Python
- Able to create database schemas that represent and support business processes
- Strong unit test and debugging skills
- Proficient understanding of code versioning tool
- Excellent written and verbal communication skills.
- Should know about HDL and LLD.
- Should know about making python packages
- Should have worked on microservice-based Architecture

Requirements
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Previous working experience as a Python Web Developer for min 2 years.
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Hands-on experience with Django, Flask, or other Python frameworks.
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Experience with Design implementation of objects and data models.
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Working knowledge in JavaScript, HTML5, CSS3.
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Understanding of CI/CD practices.
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Familiarity with some ORM (Object Relational Mapper) libraries.
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Proficient understanding of code versioning tools such as Git, Mercurial, or SVN.
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Hands-on experience with complex scripts in Python to capture business logic and automate system management tasks.
Your primary focus will be the development of all server-side logic, definition and maintenance of the central database, and ensuring high performance and responsiveness to requests from the front-end. You will also be responsible for integrating the front-end elements built by your co-workers into the application. Therefore, a basic understanding of front-end technologies is necessary as well.
Responsibilities
- Integration of user-facing elements developed by front-end developers with server side logic
- Writing reusable, testable, and efficient code
- Design and implementation of low-latency, high-availability, and performant applications
- Implementation of security and data protection
Skills And Qualifications
- Strong proficiency with JavaScript & OOPS
- Knowledge of Node.js and frameworks available for it
- Understanding the nature of asynchronous programming and its quirks and workarounds
- Good understanding of server-side CSS preprocessors
- Basic understanding of front-end technologies, such as HTML5, and CSS3
- Understanding accessibility and security compliance
- User authentication and authorization between multiple systems, servers, and environments
- Creating database schemas that represent and support business processes
- Implementing automated testing platforms and unit tests
- Proficient understanding of code versioning tools, such as Git
- Knowledge of AWS will be preferable
- Creating Rest based Backend for both Web & Mobile Apps
- Standard Code Quality
- Can work on both SQL and NoSQL DB
- Familier with GraphQL
Required Candidate profile
- Experience creating backend using Node.JS- Hands on experience with JavaScript Development on both client and server-side
- Experience with modern frameworks and design pattern
Perks and Benefits
Overtime Incentives and Flexible Office HoursSr. Software Developer
Job Description:
- Writing clean, high-quality, high-performance, maintainable code
- Develop and support software including applications, database integration, interfaces, and new functionality enhancements
- Coordinate cross-functionally to insure project meets business objectives and compliance standards
- Responsible for regular enhancement of Algorithm
- Develop and support software architecture
- Responsible for DevOps planning
- Support test and deployment of new products and features
- Participate in code reviews
Skills Required:
- Excellent programming skills and knowledge of complete development process.
- Should have knowledge in PHP, CI, Node.JS, MySQL, MongoDB and Modern JavaScript.
- Knowledge of TDD tools
Qualification:
BE/B.Tech/MCA/Mtech/M.E/PHD









